Mechanism for making printing-surfaces.



No. 637,598. Patented Nov. 2|, I899. E. HETT. 1 MECHANISM FOR MAKINGPRINTING SURFACES. (Application filed Jan. 3, 1899.)

(No Model.) 8 Sheets$heet I.

WITNESSES: INVENTOR v ATTORNEYd' m: uomus ravens camera-um wAswmomn. n.c.

No. 637,598. I Patented Nov. 2|, I899. E. HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1599. Model-3 8 Sheets8heet 2,

mu -mill 11 WITNESSES: INVENTQR ATTORNEYJ Patented Nov. 2i, I899. E.HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1899.)

8 Sheets8haet 3.

(No Model.)

INVENTOR WITNESSES:

- ATTORNE J Patented Nov. 2|, I899.

E. HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1899.)

8 Sheets-Sheet 4.

(No Model.)

INVENTOR WITNESSES:

. ATTURN EYJ TNC Noam: vmws 90.. PHOTO-LITNO wnsumwon. a c,

Patented Nov. 2|, I899. E. HETT. MECHANISM FOR MAKING PRINTING SURFAGES.

(Application filed Jan. 3, 1899;)

8 Sheets-Sheet 6.

(No Model.)

mm M

n" 1 7 u ml 1T Ill.

INVENTOR WITNESSES BY flaw/u W In: news mans ca. PHUTO-LI'YHOJWAI MNGTOND c.

(No Model.)

' Patented Nov. 2|, I899. E. HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Applicaltion filed Jan. 3, 1899.)

8 Sheets-Sheet 7. 4

TNE mama mks co. wmTO-uTNO" WASHINGTON D4 No. 637,598. Patented Nov. 2|,I899.

E. HETT. MECHANISM FUR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1899.)

8 Sheets-Sheet 8.

(No Model.)

WITNESSES:

' ATTORNE d YHE NORRIS wzrns ca. uo'ro-ufm., WASHINGTON n. c.

PATENT EDWARD HETT, OF NEW YORK, N. Y.

MECHANISM FOR MAKING PRINTING-SURFACES.

SPECIFICATION forming part of Letters Patent No. 637,598, dated November21, 1899.

Application filed January 3, 1899.

To all whom it may concern:

Be it known that I, EDWARD HETT, a citizen of the United States, and aresident of New York, (New Dorp,) in the county of Richmond, State ofNew York, have invented Mechanism for Making Printing-Surfaces, of whichthe following is a specification.

This invention relates to a machine adapted for use in makingprinting-surfaces, whether planographic, relief, intaglio, or otherprinting surface.

The object of the invention is to provide a machine wherebyprinting-surfaces may be accurately and economically made in accordancewith my new process as set forth in an application filed by me onNovember 2, 1898, Serial No. 695, 281, and also in accordance with mynew process set forth in an application filed by me October 4,1899,Serial No. 732,439.

The machine embodying the present inven- Serial No. 700.922. (No model.)

broken away. Figs. 9, 10, 11, and 12 illustrate diagrammatically theprogressive steps in the cooperation of turning over the conveying-surface from its support upon the secondary surface. Fig. 13 is asectional elevation of the primary surface seated on its support.

Referring now more particularly to the various features and combinationsof features embodying the invention, as shown in the mechanismillustrated in the drawings, 1 and 2 are respectively the primary andsecondary surfaces. They are cylindrical in form and are preferablycontinuous and removable from their respective supporting-cylinders 3and 4. The primary surface 1 has an accurate preostablished seat in themachine, so that it and successive primary surfaces may be mountedtherein in accurate predetermined position both longitudinallyandtranstion is organized to bring 1nto cooperation a primary surfacei.(2., a surface developed and capable of printing--a conveying-surfaceadapted to receive an imprint of the design of the primary surface, anda secondary surface-4'. e., a surface adapted to be made into aprinting-surface. These three surfaces are arranged and designed tocooperate in such a way that the primary surfaceprints its design uponthe conveying-surface and the conveying-surface imparts the same designupon the secondary surface. The sec-. ondary surface is then developedand becomes a printing-surface, or the secondary printing-surface, asthe secondary surface when developed will be herein called.

The invention consists of the features and combinations of featureshereinafterset forth.

In the drawings forming part of this specification and in which likereference characters indicate corresponding parts throughout the variousviews, Figure l is a side elevation of a machine embodying thisinvention. Fig. 2 is a plan view. Fig. 3 isa vertical sectionalelevation on the line 3 3 of Fig. 2. Fig. 4 is a vertical sectionalelevation on the line at 4 of Fig. 2. Fig. 5 is an end elevation lookingin the direction of the arrow 5 of Fig. 2. Fig. 6 is a verticalsectional elevation on the line 6 6 of Fig. 2. Fig. 7 is an enlarged endview of the support for the conveying-surface. Fig.

a side elevation of said support centrally versely. The seat of theprimary surface is on the supporting-cylinder 3. The ribs 5, formed onthe inner side of a primary surface, and the corresponding longitudinalgrooves formed on the supporting-cylinder 3, in which the ribs fitamarked rib in a marked groove-determine the transverse orcircumferential location. of the primary surface in its seat. Thelongitudinal position of the primary surface on its cylinder isdetermined by the collar or stop 3, formed on one end of the support 3,(see Fig. 13,) against which the primary surface accurately fits whenmounted in its seat on the support. The arrangement of the primarysurface and its support, as shown in Fig. 13, is substantially the sameas that of the printing-form shown and described in my pendingapplication, Serial No. 537,582, filed February 7, 1895. Thusprestablished guides for quickly and accurately seating the primarysurface are provided. Of course Various other forms of prestablishedguides for this purpose may be employed. The secondary surface 2 has anaccurate preostablished seat on the supporting-cylinder4, in which itand successive secondary surfaces may be mounted in accuratepredetermined position both longitudinally and transversely and withreference to prestablished guides, these guides being the same as thoseshown and described for the primary surface. 6 designates the ribs ofthe secondary surface, which fit in the corresponding grooves of thesupporting-cylinder. The cylinders 3 and 4 are fixed on the shafts 7 and8, supported-in boxes 9 and 9 adapted to slide in the oblique recesses10 and 11 formed in the main frame. The primary surface is provided withan inking-frame 12, carrying inking-rollers supplied from the inkdistributing cylinder 13, loosely mounted on the shaft 14, on which theframe 12 is fixed. 15 is a damping-frame carrying damping rollersdesigned to supply the primary surface with water when required. Thisdamp: ing-frame 15 is pivotally mounted on the shaft. 14. Theinking-frame has a segmental gear 17 in mesh with the worm 18, turned bythe handwheel19. Thus the inking-frame,with

its inking-rollers, may be moved toand from the primary surface 1. Thedampingframe 15 has a segmental gear 20 meshing with a worm 21, turnedby the gear 22, which is'actuated by the gear 23, fixed on thehand-shaft 24. Thus the damping-frame,with its damping-rollers, may bemoved to and from the printing-surface.

Thesecondary surface 2 is provided with an inking-frame anddamping-frame 26,

carrying inking and damping rollers and mounted on the shaft 27 of themain ink-distributing cylinder 28,.the construction andarrangement ofthese parts being similar to that of the inking and damping frames 12veying-surface on the support 37.

and 15. The inking-frame 25 has the segmental gear 29' in mesh with theworm 30, turned by the hand-wheel 31. The dampingfra-me 26 has thesegmental gear 32 inmesh with the worm 33, turned by the gear 34, whichis actuated by the gear 35, fixed on the hand-shaft 36. These devicesfor moving the inking and dampening frames 25 and 26' are similar to thecorresponding devices already described for the inking and dampeningframes 12 and 15.

- The support 37 for the conveying-surface 38 is preferably cylindricalin formand is mounted loosely on a rotating shaft 39, supported in theframe of the machine. The support 37 is so arranged that the primarysurface and secondary surface may be easily moved to and from it, so asto efiect the desired contact of these surfaces with the-con- I g Thesupport 37" may vary considerablyin shape and arrangement; but it'ispreferably constructed, arranged,and equipped as shownin the drawingsand as will now be described.

Loosely mounted on the shaft 39 are=two bosses40, having'arms 41, inwhich slidetlie extensible arms42, carrying a shaft 43, on which is aroll of transfer-paper 44. The bosses 40'have gear-teeth meshingwith thegearsz46 and 47, fixedon the shaft48, carried by the support 37 andturned by thehandwhen moved'out,-so as to bring the roll 44 out ment ofthe" invention there is shown a haddof its recess 50 in the cylinder37.- When the catch 54 is released and the roll 44 is moved out and thehand-Wheel 49 is turned, the arms 42 are turned around the shaft 39 andthe roll 44 travels over the surface of the cylinder 37 to the grippers55,which are fixed on a shaft 56. The shaft 56 is provided with arigidarm 57, having a spring 58 acting upon the arm so as to hold thegrippers yieldingly in gripping position. The end of the paper .38visthen brought into engagement with the grippers, and the roll 44 iscarrie'd'back and brought to place in its recess 50 59 is arubberblanket stretched permanently over the cylinder 37 and lying beneath thepaper 38. When the conveying-surface 38 is thus disposed upon thecylinder, the cylinder is brought into positivev contact with theprimary surface and receives an imprint of the design of the primarysurface,-the primary surface and the conveying-surface rotatingtogether, the conveying-su rface beginning its contact at its end towardthe grippers. After the conveying-surface has received its impressi'onthe primary surface and the conveying-surface are separated andthesecondary surface andconveying-surface are brought into contact,beginning at the gripper end of the conveying-surface. Just as thecylinder 37 and the secondary surface begin to rotate in contact the arm60,*fixed on the grippershaft 56, strikes the end of a lever 61 andopens the grippers to release the paper 38, so that it may be turnedover upon the secondary surface. The lever 61 is pivoted on the mainframe. It is turned by hand into the position shown in Figs. 10, 11, and12, so as tobe' out of' the way of the arm when the cylinder 37.rotatesin conjunction with the printing-surface. As the rotation continues theearns 62, pivoted on the arms 42 and constuds 64 projecting from theinner sides of the frame of the machine and drive the rod against theknife 64*, fixed on the cylinder 37. This severs' the paper near theroll 44, so that the conveying-surface is free to be turned over fullyupon the secondary surface, which may then be separated from the sup-'porting-cylinder 37. The progressive steps of this operation areillustrated in Figs. 9, 1O, 11, and 12. In Fig. 9 the secondary surfaceis" ready to be brought into contact with the conveying-surface on itscylinder 37'. In Fig. 10 the conveying-surface has been released fromthegrippersand has just begun to be turned over upon the secondarysurface. In Fig. ll thecams 62 have just met the studs 64- and't'he'conveying-surface is aboutto be severed. I In Fig. 12 the con veyingsurface has been entirely turned over-upon the secthe cylinder 37 Thecylinder 3, carrying the primary surface, is moved toand from thecylinder" 37 by any suitableimeans. In the presentiembgdiceases a lever65, fixed on a shaft 66, to which are secured arms 67, having links 68pivotally connected therewith and with toggles 69, which are connectedeach at one end to the frame and at the other end to the sliding box 9.By operating the lever the cylinder 3 may be moved to and from thecylinder 37 and the requisite pressure exerted between the primarysurface and the conveying-surface 38. The secondary surface is similarlyprovided for the same purpose with a hand-lever 70 on the shaft 71,carryingarms 72, connected by links 73 to the toggles'74, which move theboxes 9.

For the purpose of enabling the primary and secondary surfaces to beremoved from the supporting-cylinders hoisting-arms are provided. Thehoisting-arms 75 for the primary surface are each provided with a fork76 at its upper end, in which rests the shaft 7. These arms have alsoracks 77, which are in mesh with the gears 78 and 79 on the shaft 80. Onthe shaft 80 is a gear 81 in mesh with a worm 82 on the hand-shaft 83.By turning the hand-shaft 83 the shaft 80 is rotated and thehoisting-arms 75 are moved upward to lift the shaft 7, so that thecylinder 2 clears the frame of the machine, when the primary surface 1may he slipped off and another primary surface substituted for it. Inthis operation one end of the shaft 7 is generally supported by anapparatus such as is shown in an application filed by me July 12, 1898,Serial No. 685,764, which permits the fork 76 of one of thehoisting-arms 75 to be turned down out of the Way. If desired, theentire shaft and cylinder 3, with the primary surface carried thereby,may be removed from the machine and another cylinder of like proportionswith a new primary surface substituted therefor. The hoisting-arms areof course employed to lower the shaft again in place. For the secondarysurface 2 there is a pair of hoisting-arms 84, operated and constructedsimilarly to the arms 75. These hoisting-arms 84 are operated by thehandshaft 85 through worm 86, gear 87, and shaft 88, gears 89 and 90meshing with the racks 91 on the arms 84. The supporting-cylinders 3 and4 are located above the supporting-cylinder 37 and move to and from thesame on lines coincident with their radii and with the radii of thecylinder 37.

The shaft 39 is the main drivingshaft whereby the cylinder 37 is drivenconjointly with the primary surface or conjointly with the secondarysurface and whereby the primary and secondary surfaces are drivenseparately and each in conjunction with its inking and damping rollers.For this purpose the gear-wheel 92 is fixed on the shaft 39 and mesheswith a gear 93, fixed on a short shaft 94, which carries the gear 95,meshing with the gear 96, fixed on the shaft 7. The shaft 7 has fixed onit a gear 97, adapted to mesh with a gear 98 on the hub of the cylinder37 whe/n the primary surface is in contact with the conveying-surface.The short shaft 94 is carried by the toggle-arms 99 and 100, sleevedthereon at their inner ends and at their outer ends sleeved on the shaft39 and the shaft 7. When the shaft 7 is moved from the cylinder 37, soas to bring the cylinder 3 into position for its primarysurface to beinked or is moved toward the cylinder 37 to bring the gears 97 and 98into mesh, the toggle-arms 99 and 100 carry around the shaft 94 with itsgears 93 and 95, so as to keep them in mesh with the gears 92 and 96,respectively. The toggle-arms 99 and 100 are of such length as to permitthe shaft 7 to be lifted by the hoisting-arms 75 high enough to enablethe primary surface to he slipped from its cylinder 3. Idle gears 101and 102, supported on studs projecting from the inner side of the mainframe, mesh with each other, and the former meshes with the gear 92 andthe latter with the gear 103, fixed on the long hub of the cylinder 13.Thus the shaft 39 operates to drive the main ink-distributing cylinder13, which drives the other inking-rollers. By means of the gearingdescribed it will be seen that when the shaft 7 is moved from thecylinder 37 the shaft 39 may drive the cylinder 3, carrying its primarysurface and also the inking rollers. When the shaft 7, with the primarysurface, is moved toward the cylinder 37, the primary surface moves outof contact with the inkingrollers and the damping-frame is moved backout of the way, so that the gears 97 and 98 mesh. Thus the gear 97through the gear 98 drives the cylinder 37, the primary surface andconveying-surface rotating together in positive contact under suitablepressure for the purpose of printing or imparting the design of theprimary surface upon or to the conveying-surface.

The gearing for the secondary surface and its supporting-cylinder andfor the inkingrollers is constructed and arranged in the same way asthat just described and need be only briefly referred to. The gear 92meshes with the gear 104 on the short shaft 105, which carries the gear106, meshing with the gear 107 on the shaft 8. The shaft 8 carries thecylinder 4 for the secondary surface and also a gear 109, adapted tomesh with the gear 98. The toggle-arms 110 and 111 are sleeved at theirinner ends on the shaft 105 and at their outer ends on the shafts 39 and8. The gear 92 meshes with the idle gear 112, which meshes with the idlegear 113, which meshes with the gear 114, fixed on the long hub of thecylinder 28. These idle gears are supported on studs projecting from theinner side of the main frame. The gear-wheels 97, 98, and 109 are somarked that the gear 98 may mesh with the other two always inidentically the same way in order that the primary surface and theconveying-surface and the conveying-surface and secondary surface may bebrought into accurate predetermined cooperating relation for the purposeof imparting the design from the primary surface IIO surface 38 byoperating the lever 65. The" shaft 39 is then rotated and the primaryand con veying sur'faces rotate together in positive rolling contact andthe design of the primary surface is printed upon the conveying-surface.The primary surface is then separated from the conveying-surface and thesecondary surface is brought into positive rolling contact with theconveying-surface and the design carried thereby is imparted tothe sec;

ondary surface, the conveying-surface for this purpose being turned overupon-the secondary' surface. The secondary surface is then separatedfrom the supporting-cylinder 37 v and is suitably developed into thedesired sec on dary printing-surfacatheinking and damping rollers in theframes 25 and 26 being prefera-bly usedin this developing operation. Thesecondary printing-surface is then removed from the machine and ismounted in a press and employed in printing. Of course, if de-' sired,the secondary surface may be removed from the machine and subsequentlydevel oped, the inking and damping frames, with their rollers, beingdispensed with. The same primary surface may be used in makingaplurality of identical secondary surfaces suc'ces- I si-vely supportedin place in the machine in ondar-y printing-surfaces will be identicaland identically placed thereon, and these secondary' printing-surfacesmay be and preferably are interchangeable with one another and withtheir coactin g primary surfaces and con structed and designed to fit ina preestablished seat or seats in a printing-press. A series of primarysurfaces designed and constructed for register may besuccessivelysnpported in definite and predetermined position in themachine-and each employed in making a plu ral'ity of identical secondaryprinting-sin faces, so that from the series of registering primarysurfaces a plurality of series of registeri-ng secondaryprinting-surfaces may be made. The supporting-cylinders 3 and 4 arepreferably identical, as shown, and it is evident that instead ofsupporting the primary and secondary surfaces on separate cylinders theprimary surface, after printing on the.

conveying-surface, may be removed and asecondary surfacesubstituted'therefor onthe same cylinder and be brought into coactionwith the conveying-surface, having the de sign of the primary surfaceprinted thereon.

In this way the' secondary printing-surface may be made identical withthe primary surface with the same accuracy as where the pri mary andsecondary surfaces are supported on their different cylinders- It Willbe seen' that when the primary and secondary su'r faces attest-primed onthe same cylinder they" on the separate cylinders, they are supported inequivalent definite and predetermined 00- operating relation withrespect to each other and with respect to the-conveying-surface. Thesuccessive primary surfaces are arranged in the same position" and inthesamerelation with respect to the support for the convey i-ng-surfaceor with respect to the successive conveying surfaces carried thereby.-The same is true in regard to the successive secondary surfaces. Thesuccessive coacting primary and secondary surfaces are, moreover,arranged in the same relation with respect to each other.

It will be noted that this invention makes it possible to dispense withthe employment of a separate basic surface heretofore required in makingeach printing-surface and that great economy is effected in time andlabor and painstaking care heretofore required inmaking'prin'ting-surfaces, especially printing-surfaces designed toregister,

as in multicolor-printing.

; Instead of using a'separate and fresh concourse use a permanentconveying-surface, suchas a sheet of rubber.

The primary and secondary surfaces may be made of any suitable material,but are & preferably made of metal, which may be electrolyticallydeposited upon a suitable base.

I- prefer to electrolytically deposit zinc upon 5 copper.

In'developing the primary and secondary surfaces-any suitable method maybe used-such' as light or deep etching, routing out, &c.'and they may bed'evoloped so as .1- o be planographic, relief, intaglio, or otherwise.The primary and secondary surfaces maybe difieren'tly or similarlydeveloped.

While it is of course important that the rolling contact oftheconveying-surface with the primary and secondary surfaces be positive'-that is, without slipping-it is not essential that intermeshing gearsbe employed for this purpose. Other means may be employed to accomplishthe result and to drive the bodies inunison and the intermeshing gearsmay be dispensed with. Again-,while I make use of a marked tooth and amarked vrecess in the'intermeshing gears'as preestablished guides tobring the primarysurface and conveying surfaceand the secondary surfaceand conveying surface into accurate predetermined cooperating relationitwill be obvious that various other devices may be used for thispurposerVarious changes may be made in the mechanism herein shown and describedfor operating the primary, secondary, and conveying surfaces, and'various changes maybe made in the shape and arrangement of theprimary,-scondary,ana conveying surfaces nd various features may beemployed apart from the others and in diiferent relations.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a machine adapted for use in making printing-surfaces, thecombination of a drum adapted to carry a conveying-surface mountedloosely on the driving-shaft so as to rotate thereon, a cylinder adaptedto carry a printing-surface movable to and from said drum, whereby theprinting-surface and conveyingsurface may be brought together inoperative contact and separated, intermeshing gearing connecting saidcylinder and drum, and intermeshing gearing connecting the drivingshaftand said cylinder arranged to maintain its connection when said cylinderis moved to and when it is moved from said drum, whereby said cylinderand said drum may be driven together from the driving-shaft and wherebysaid cylinder may be driven from the driving-shaft when separated fromsaid drum.

2. In a machine adapted for use in making printing-surfaces, thecombination of a drum adapted to carry a conveying-surface mountedloosely on the driving-shaft so as to rotate thereon, a cylinder adaptedto carry a printing-surface movable to and fromsaid drum, whereby theprinting-surface and conveyingsurface may be brought together inoperative contact and separated, intermeshing gearing connecting saidcylinder and dru m,intermeshing gearing connecting the driving-shaft andsaid cylinder arranged to maintain its connection when said cylinder ismoved to and when it is moved from said drum, whereby said cylinder andsaid drum may be driven together from the driving-shaft and whereby saidcylinder may be driven from the driving-shaft when separated from saiddrum, and a movable frame carrying inking-rollers adapted to cooperatewith the printing-surface on said cylinder.

3. In a machine adapted for use in making printing-surfaces, thecombination of a main driving-shaft and drum adapted to carry aconveying-surface and loosely mounted thereon, twocylinders adapted tocarry primary and secondary surfaces and mounted in sliding boxes,whereby the said cylinders may be moved to and from said drum, gearingconnectin g each of said cylinders with said drum, whereby when eithercylinder and the drum are brought together they may rotate positivelytogether, gearing connecting the driving-shaft with each of saidcylinders arranged to maintain its connection when said cylinders aremoved to or from said drum, and means for moving each of said cylindersto and from said drum and thereby meshing and unmeshing the gearingconnecting said cylinders with said drum, whereby either of saidcylinders may be driven separately or in conjunction with said drum.

4. In a machine adapted for use in making printing-surfaces, thecombination of a main driving-shaft and drum adapted to carry aconveying-surface and loosely mounted thereon, two cylinders adapted tocarry primary and secondary surfaces and mounted in sliding boxes,whereby the said cylinders may be moved to and from said drum, gearingconnecting each of said cylinders with said drum, whereby when eithercylinder and the drum are brought together they may rotate positivelytogether, gearing connecting the driving-shaft with each of saidcylinders arranged to maintain its connection when said cylinders aremoved to or from said drum, means for moving each of said cylinders toand from said drum and thereby meshing and unmeshing the gearingconnecting said cylinders with said drum, whereby either of saidcylinders may be driven separately or in conjunction with said drum, andswinging frames carrying inking-rollers for said primary and secondarysurfaces.

5. In a machine adapted for use in making printing-surfaces, thecombination of a drum adapted to carry a conveying-surface mountedloosely on the driving-shaft so as to rotate thereon, a cylinder adaptedto carry a printing-surface movable to and from said drum arranged toslide obliquely in the main frame, whereby the printing-surface andconveyingsurface may be brought together in operative contact andseparated, intermeshing gearing connecting said cylinder and drum,intermeshing gearing connecting the driving-shaft and said cylinderarranged to maintain its connection when said cylinder is moved to andwhen it is moved from said drum, whereby said cylinder and said drum maybe driven together from the driving-shaft and whereby said cylinder maybe driven from the drivin shaft when separated from said drum, andhoisting-arms for lifting said cylinder from its working place in themachine.

6. In a machine adapted for use in making printing-surfaces, thecombination of a main driving-shaft and drum adapted to carry aconveying-surface and loosely mounted thereon, two cylinders adapted tocarry primary and secondary surfaces and mounted in sliding boxesarranged to slide obliquely in the main frame to and from said drum,whereby the said cylinders maybe moved to and from said drum, gearingconnecting each of said cylinders with said drum, whereby when eithercylinder and the drum are brought together they may rotate positivelytogether, gearing connecting the driving-shaft with each of saidcylinders arranged to maintain its connection when said cylinders aremoved to or from said drum, means forvmoving each of said cylinders toand from said drum and thereby meshing and unmeshing the gearingconnecting said cylinders with said drum, whereby either of saidcylinders may be driven separately or in conjunction with said drum, andhoisting-arms whereby said cylinders may be lifted from their workingplaces in the machine.

6 i- I Q a 637,598

7. In a machine adapted for use in making. printing-surfaces, thecombination of a drum I adapted to carry a conveying-surface mounteddriving-shaft and when separated from said drum, hoisting-arms forlifting said cylinder from its working place in the machine, and aswinging frame carrying inking-rollers for said printing-surface. c v

. 8. I In a machine adapted for use in making printing-surfaces, thecombination of a main driving-shaft and drum adapted to-carry aconveying-surface and loosely mounted thereon, two cylinders adapted tocarry primaryand secondary surfaces removable therefrom .and mounted insliding boxesarranged to slide obliquely in the main frame to and fromsaid drum, whereby the said cylinders may be moved to and from saiddrum, gear-ingconnectin g each of said cylinders with said drum, wherebywhen either cylinder and the drum are brought together they may rotatepositively' together, gearing connecting the driving-shaft with each ofsaid cylinders arranged to maintain its connection when said cylindersare moved to or from said drum, means for moving each of said cylindersto and from said drum and thereby meshing and unmeshing the gearingconnecting said cylinders with said drum, whereby either of saidcylinders may be driven separately: or in conjunction with said drum,and hoisting-arms whereby said cylindersmay be lifted fromtheir workihgplabes in the'machine. v r

ln testimony whereof I have signed my 'nameto this specification in thepresence of two subscribing witnesses.

. EDWARD HET'I, Witnesses:

G. W. DONALDSON,

, EDWIN SEGER.

